<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
    <div class="cente"></div>
        <form class="form-inline">
                <div class="form-group">
                  <label for="exampleInputName2">Name</label>
                  <input type="text" class="form-control" id="exampleInputName2" placeholder="Jane Doe">
                </div>
                <div class="form-group">
                  <label for="exampleInputEmail2">Email</label>
                  <input type="email" class="form-control" id="exampleInputEmail2" placeholder="jane.doe@example.com">
                </div>
                <button type="submit" class="btn btn-default">Send invitation</button>
              </form>
              

        <script src="https://cdn.jsdelivr.net/npm/jquery@1.12.4/dist/jquery.min.js"></script>
        <script src="https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/js/bootstrap.min.js"></script>
</body>
</html>